无芒虎尾草是匍匐性或簇生的多年生牧草。具有直立或弯曲向上生长的茎,高达0.5—2米。叶无毛,长15—50厘米,宽2—20毫米;在匍匐茎上的叶较短,每茎节上有2—4条叶丛。圆锥花密集有3—20个指状或半指状的总状花序。德状的总状花序长4—15厘米,小穗有3—4朵小花;在小穗最下部能育的小花长2.5— Chloris virgata is a creeping or tufted perennial pasture. Stems with upright or curved upward growth, up to 0.5-2 meters. Leaves glabrous, 15-50 cm long, 2-20 mm wide; leaves short on stolons with 2-4 leaf foliage per node. Convolvulus densely with 3-20 finger or half finger raceme. German-shaped racemes 4-15 cm long, spikelets 3-4 flowers; spikelets in the bottom of fertile small flowers 2.5-